Cutter.



J. F. MORGAL.

CUTTER.

APPLICAHON FILED JAN. 10,1914. RENEWED SEPT. 23. I915.

Patented May 23, 1916.

i so

of one of the cutter blades.

TED STA TES PATENT OFFICE.

4 aorm r. MORGAL, OF'DAYTON, onro.

Application filed. January 10, 19-14, Serial No. 811,326. Renewed September 23, 1915.

To all whom it may concern i Be it known that I, JoH 'F. MoRoAL, a, citizen of the United States,

Dayton, in the county of Montgomery and State; of Ohio, have, invented certain new and useful Improvements in Cutters, of

which the following, iiia specification, reference being had there to the accompany- *ing drawings.

This invention relates to cutters having removable iblades. V The object of the invention is to provide means whereby the blade of a cutter maybe secured in position'in such amanner that it willbe held firmly against dis placementand will resist any normal strain to which it may be subjected; and further,

* j releasethe same; that they will comprise a Iminimum number ofiparts, thus materially to so construct the. fastening means that they can be quickly and easily manipulated to fasten the blade in position or to reducing the cost of manufacture; and. that i the bladeyma-y be placed in position independently {of the fastening member.

' In the accompanying drawings Figure I a side elevation, partly broken a-way,

of? a rotary cutter embodying my invention; Fig. 2 is anedge' view of such a cutter, partlyfn section; and Fig. 8 is a detail view In these drawingsI have illustrated invention as applied to a rotary. cutter for f f a a millinginachine but it will be understood B5 ,purpose of illustration only and that'the invention can be applied to cutters of varithat this type of cutter is chosen for the ous kinds without departing from the essentia-l'features thereof. The body portion or cutter head, whichwis shown at 1, is pro vi dedwit h blade-receiving seats which, in the present embodiment of the invention, comprisetransverse slots 2 into which the blades fitq In cutters of this type, and par- 451m:

ticularly milling cutters, the work must be; done with great exactness and any material variation will render the piece operated upon worthless. necessary that the, blades of a cutter of this It is, therefore,

kind should be held in position with such firmness 'andstrength as to effectually prevent any" appreciable displacement thereof,

and, inasmuch as the work of a milling cutter is'ppon metal, the st ain towhich T the blades are subjected is very great and I to upreventthis lateral displacement a fas Specification of Letters Patent.

residing at:

.CUTTER.

Patented May 23, 1916.

Serial No. 52,305.

toning device must have, a large amount of strengtln In provldmg means for fasteri- A ing the blades in their seats I have formed ,1 i l 1n the head sockets 3 which are adjacent to and in the present instance extend sub stantially parallel with the blade seats and I have provided each blade with a part adapted to extend into the socket. Removably mounted in the socket is a fastening 5 member which engages that portion of the blade which extends into the socket and holds the same firmly against movement. 7

The fastening member and thesocket preferably have interlocking deviceswhich per- Init of said member being quickly and easily placed in positio nd render the, Y

same very strong when sd placed I th To this end I have formed each blade with a curved recess 5 1n1ts forward face and ha ve. inserted in thisrecess, preferably by driving, a metal block, such as a disk 6.

The disk isinserted so tightly in its recess a that it is firmly secured toand becomes a is such that it projects through the slot 4 into the socket 3 and itsthickness is such that while it is capable of free radial 'move ment in the slot, it is held a ;ainst. lateral movement therein, thus causing it to hold 515 the blade against lateral displacement. To

retain the blade in its seat I preferably employ a single fastening member which is here shownin the form of a screw 7 having a screw-threaded portion adapted to engage a screw-threaded extension 8 to the socket. The head of the screw j has its under sur-' face shaped to fit agains't'the adjacent edge of the block orldisk so that the fastening device when screwed into position will bear tightly against the edge of this disk and will engage such portions of the same as i will hold it securely against radial or edge-- wise movement. The outer face of the head" of the screw or fastening device preferably lies substantially flush with the adjacent portion of the periphery of the cutter head art of the blade. The diameter of the disk 90 l V} and is provided with an openingto receive an implement to-actuate the same, such as -'"that it is not necessary to place the blade and fastening member in positionsi1nulta-' a'slot 9 to receive the bit of ascrew driver or an angular socket-to receive a corresponding wrench, both types of screw being on the market.

The device Will be fully understood from the foregoing description and it will be apparent not only that --the device possesses great strength and is very posit ve n its action butthat it contains a minimum number of parts, there beingin fact-but one part to the fastening 'device, that is, the screw,

because the disk or pr0 ection 6 is preferably rigidly secured to and forms a part of the blade, although, asatisfactory device could be made With the-disk loose in its seat in the recess of theblade, so long as the fit between the blade andt-he disk is such as to prevent any material relativemovement of these parts. Further, it will ,be apparent neously in order to cause a properengagedo wn afterward.

ment of the parts. The blade may be placed in its seat and the fastening, member screwed :meinber itself directly engages that part of the blade which extends into the socket and the use of a thimble or interposed member to form the connection is rendered unnecessary, thus materially simplifying the conheld against-lateral displacement, and a fas- 1 struction and lessening the cost of manufacture, as Well as facilitating the assembling of. the parts.-

'Having thus fully described my invention, what I claim as new and desire toss cure b Letters Patent, is

1. The combination, with a cutter head having a blade seat, and a socket adjacent to said seat, of ablade mounted in said seat and having a part extending into said socket, and a fastening device screw-threaded into said socket and having a head, that part of said blade which extends into said socket be- ,ing arranged to be engaged by said head.

2. The combination with a'cutter. havin 7 h i a blade seat; and a socket adjacent tosaid seat, of a blade mounted in said seat and having-a pargextendingt intosaid socket and Further, the fastening ten ing d vice mounted in said socket and having a -head to engage said part of said blade and hold it against longitudinal movement. A v

3-. The combination, with a cutter head having a blade seat, a socket adjacent to said seat, and a slot connecting said seat and said socket, of-a'blade mounted in said seat, a block s'ecured to said blade and extending through said. slot into said socket, and a :fastening device mounted in said socket and .havmg a part to engage said block to hold the same against movement in said slot, said fasteningdevlce and said socket havmg 1nterlocking parts.

threaded portion, and a slot connecting said said seat, a disk mounted edgewise in said socket and said seat, of a blade mounted in slot, secured to said blade and projecting into said socket, and a screw-threaded fastening device mounted in said socket and having a part adapted to engage the edge of said disk to hold the same against movement in said slot.

6. The combination, with a cutter head having a blade seat, a socket having a screwthreaded portion, and a slot connectingsaid socket and said seat, sofa blade mounted in said seat and having a recess in the face thereof, a disk mounted in said recess and extending through-said slot into said socket,

and a. screw mounted in the screw threaded portion of said socket and having lts head arranged in engagement with said disk.

Iii-testimony whereof, I aflix my signature in presence of two witnesses.

- JOHN ,F. MORGAL. Witnesses: F. W. Sorrnnrnn,

H. L. HAMMAKER. 

